// Create array lists for spell errors
ArrayList spellErrors = new ArrayList();
StringBuilder sbSpellErrors = new StringBuilder();

// Create spell checker
Speller speller = new Speller();

// Check whether dictionary is in cache
if (!speller.DictionaryInCache("your dictionary file"))
{
    // Get words from your own dictionary source
    DataTable dt = GetWords("your dictionary file");
    foreach (DataRow dr in dt.Rows)
    {
        string word = dr[0].ToString();
        speller.AddWord(word);
    }

    // Write dictionary into cache
    speller.CacheDictionary("your dictionary file");
}

// Call spell check
spellErrors = speller.SpellCheck("text to spell check");

// Create a string in the form of misspelledWord,textIndex,type,suggestion1,suggestion2,...|misspelledWord,textIndex,type,suggestion1,suggestion2,...
foreach (SpellError spellError in spellErrors)
{
      sbSpellErrors.Append(spellError.MisspelledWord);
      sbSpellErrors.Append(",");
      sbSpellErrors.Append(spellError.TextIndex);
      sbSpellErrors.Append(",");
      sbSpellErrors.Append(Convert.ToInt32(spellError.Type).ToString());
      foreach (string suggestion in spellError.Suggestions)
      {
          sbSpellErrors.Append(",");
          sbSpellErrors.Append(suggestion);
      }
      sbSpellErrors.Append("|");
}
sbSpellErrors.Remove(sbSpellErrors.Length - 1, 1);